Antifriction slurry for rectangular jacking pipe with large section, preparation method of antifriction slurry and grouting construction method

Abstract

The invention relates to antifriction slurry for a rectangular jacking pipe with a large section, a preparation method of the antifriction slurry and a grouting construction method. The preparation method comprises the steps of providing industrial water with the pH value of 5-9, and adding the industrial water into a stirring tank; starting a shearing pump of the stirring tank to stir to from water circulation; providing a high-molecular polymer HS-1 and sodium bentonite, firstly adding the high-molecular polymer HS-1 into the stirring tank, and then, adding the sodium bentonite into the stirring tank, wherein the ratio of the high-molecular polymer HS-1 to the sodium bentonite to the industrial water is 5 to 16 to 195; and at least circularly stirring for 10 minutes to ensure that the mixture is stirred uniformly and no caking is generated to obtain the antifriction slurry. The antifriction slurry has the characteristics of high viscosity and low specific gravity and can be used for solving the problem that the traditional antifriction slurry cannot adapt to the construction of the rectangular jacking pipe with the large section and the construction of sandy soil layer.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a friction-reducing mud for large-section rectangular pipe jacking, a preparation method and a grouting construction method. Background technique [0002] Rectangular pipe jacking machines are used more and more in tunnel engineering. Compared with circular pipe jacking machines, they can effectively use space and reduce underground excavation earthwork. It is used for pedestrians, vehicles and other underground passages without the need for ground paving procedures, saving Time also reduces costs. In the pipe jacking construction, in order to reduce the friction between the soil and the pipe joint, a kind of mud material is injected outside the pipe joint through the grouting hole inside the pipe joint. The mud material is called "anti-friction mud". Through the sufficient and uniform grouting of anti-friction mud, a circle of mud layer is formed between the periphery of the p...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a kind of anti-friction mud for large-section rectangular pipe jacking and its preparation method and grouting construction method, and solve the problem that the existing anti-friction mud cannot adapt to the construction of large-section rectangular pipe jacking and cannot adapt Sandy soil construction, existing manual grouting has low efficiency, poor effect, and danger

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